Blade-backing machine



June 14, 1927.

H. J. GAISMAN ET Al..

BLADE BAQKI'NG MACHINE originalFiled Maz-ch 25. 1923 5 sheets-Sheet 1A .Il Il Il lll IIVII l III ,Il Il illll ||.I.|\I Il June 14, 1927.

H. J. GAISMAN ET AL BLADE BACKING MACHINE June 14, 1927. 1,632,593

original Filed March 23, 192s 5 snags-shut 3.

Y I 'miic/one @mwa/141i June l 14 1927 H. J. GAlsMAN ET AL BLADE BACKING MACHINE original Filed March 23, 1923 5 sheets-sheet 4 www e1 June 14 1927' H. J. GAlsMAN ET AL BLADE BAOKING MACHINE 5 Sheets-Sheet 5- Orizinal Filed March 2?.. 1925 Y n v m Nm PRoPREToR am M ATTORNEY Patented June 14, 1327..

i UNITED 'STATES i V1.fiefzas-' PATENT- .or-"1nC13.,l

HENRY J. GAIsMAn, or NEW YORK', am) CONRAD' sennmacgnn, or LYNNBRoox,

l i NEW YORK, ASSIGNORS TO AUTAN IPORATION OF DELAWARE.

QORPORATION, F DOVER, DELAWARE,- A OOR- v BLADE-nAcxInG'MncHINE.

,Application med' maren as, 1923, `serial N9. 627,094. I Renewed November 1s, 1926.

Some safety razor blades are provided with strips, called backings', clamped along the back Iedges 'remote frm the cu'ing edges, which provide means for retai ing the blades in safety razor frames or holders as well as stifl'en'ing the blades. Y e The object of our invention is to provide means to secure backing pieces in successive -order along a strip of steel `to be used for razor blades and tosever the strip successively between adjacent backing pieces, so "that each time/the strip lis severed a blade having a backing attached thereto will be delivered. Y.

Our invention comprises novel details of improvement that will-be more fully hereinafter set forth and then pointed out in the claims. y

Reference is to be had to the Vaccompanying drawings forming a part hereof, wherein Fig. 1 is a plan view of a machine embodying our invention; Fig.,2 is a cross section on line 2, 2, in

Fig. 1; I

Fig. 3 isl a' partly sectional end view looking from the right,r handv side vrof Fig. 1;

Fig 4 is anenlargedpartly sectional detail plan -view of a strip severing device;

`Fig. 5 isa section on line 5, 5, in Fig. 4; Figs. 6 and 71 are details of crank means; Fig. Sis-a sectional detail ofthe receiver for blades on lin 8,'8, in'Fig. 2;

Fig. 9 isv a detail side view looking inthe ldirection ofthe arrows 9 in Fig. 1;

Fig. 10 is a plan view rof Fig. 9; v

Fig. 11 is a partly sectional detail view of driving means on line 11, 11, in Fig. 3; Fig. 12 is a sectional detail ofvmeans to feed backingpieces to the blade strip,.on line12, 12, in Fig. l2; l

Fig 13 is, a section on line 1-3, 13, in Fig. 12;

Fig. 14 is a detail of the blade strip having backs applied before 4being severed, and Fig. 15 is asectional detail on line 15, 15, -inFig.4. 1- i .Similar nu f :erals of `reference indicate corresponding parts -in the several views.

` The mainframe of the machine maybe of any suitable construction being shown comprising a table-like top 1, having legs 1a.

A main driving shaft is indicated at 2 jour-.

"nalediin suitable bearings on the frame and I provided with a loose pulley 3, preferably 5 having a weighted flywheel -4, clutch means,

'hereinafter described, being provided to con'- nectand disconnect the pu ey with shaftA 2. Astri'p for the blades vis indicated at A, shown provided with spaced notches u along the edge opposite the cutting edge a. The vmachine is provided with guiding means for the strip, shown comprising spaced rollers at 5, where the strip enters the machine, and spaced stationary guides at`6, 47, and rolls at 8 between guides 6 and 7. The rolls may 65 be spring-pressed toward each otherA by means of springs 9 pressing blocks or slides 10 that carry the'rolls, (Fig. l), Thehack-l ing pieces are indicated at B, and are shown stacked in a guideway or magazine 11de 70 pending from frame 1k The backing piecesv A,rest upon a feeding block'12-which is normally actuatedto force the backing \pieces toward the blade 12).' The block i1 2 is slidablyg'uided in the` magazine andv is 75 shown provided with a flexible connection or rope 13 passing over a pulley 14 and having, @Weight 15 to elevate the block. A remov-. able wall 11Ll is provided .on the magazine to permit charging the. latter' to reta-in the 80 backing pieces slidably therein. A spring" pressed catch 16 is pivotally Acarried by the magazine adapted toengage and retain the lower end of wall l11", (Fig; `3). At the upper end of the magazine spaced stops 11b 85 are provided against which theupper edges of the gutter-like backing ieces B are pressed by the block 12 and 1ts^weight 15 so that the blade strip A 'may travel through the uppermostv backing piece, (Fig. `12). Means are provided to feed the strip step by step and to feed the backing pleces y B successively to a position rto be clamped in successive order, end-t0 end, along the`adjacent edge of said strip.v A stop 17 on one 95 side of strip A, near the guiderolls 5, is opposed by spring-pressed dog 18 that is' carried'by a movable member 19 supported,` at 2O and pivotally connected' a't 21 with a 23, (Fig. 1)L The lever 22 is engaged by anl adjusting screw. 24 carried by an arm 25 secured'on a slide 26 mounted in a yguideway 27 on the mainframe. A `lever 28 is(piv v'bell-crank lever 22 pivotally 'supported' lat. 10P.'

CTI

of a blade, and on the reverse stroke of saidlever said dog will slide reversely to engage the next notch in strip A, and so on successively for each blade to be backed. At 33 is a feeder for the backing strips comprising a pair of jaws spaced to receive the strip A between them, said jaws being secured to a slide 34 guided in ways at 35, (Figs. 1 and i 3). The feeder jaws 33 are adapted to reciprocate along the strip A to., feed the backing ieces B from the magazine 11 into position etween opposing jaws 36, adapted -to squeeze the edge portions of the backing pieces tightly against strip A. To reciprocate the feeder jaws 33 vthe slide 34 is connected by a link 37 with a rock arm 38 that is pivotally supported upon a bracket 39 secured upon the main frame. The arm 38 is provided with a projection .40 cooperative with a cam 41 secured on a shaft 42 carried in bearings upon bracket 39. The shaft 42 is shown provided witha gear 43 in mesh with an idle gear '44 suitably journaled in the main frame, and gear 44 isin mesh with a gear 45 secured on shaft 2, (Figs. 1 and 3).. The cam 32 is secured upon shaft 42. Each time the feeder jaws 33 are reciprocated back and forth the clamping jaws 36 are also reciprocated toward and from each other in timed relation to the feeding of the back- Aing pieces B between the last named'jaws.

The jaws 36, preferably having hardened endv pieces, are slidable toward and from each other in guideways 46 on frame 1, and operated byrmeans of toggle levers comprising links 47 pivotally connected with -jaws 36 and pivotally connected at -48 to links 49 pivotally supported at 50. The ivots 50 are preferably carried by adjustab e blocks 51 adapted to be'adjusted by screws 52 and retained in set position by bolts or screws 53,

(Figs. 1 and 3),.to regulate the approach of jaws 36. The pivots 48 are' connected with depending links 54 pivotally connected at 55 with straps 56 enclosing eccentrics 57 secured on shaft 2. .When said shaft is rotated the toggle levers or links 47, 49 will be operated to cause the jaws 36 to approach a backing piece B fed by feeder 33 to clamping positlon along strip A between said jaws, whereby the jaws squeeze the sides of the backing piece against the strip A securely and thereupon the jaws 36 Crecede.' During the separation of said jaws the strip A- is fed a step and a backing piece B is also fed, and the jaws again squeeze the backing ends of two backing pieces to produce the final blades. A block 1c on table 1 supports the guides 7 and carries a reciprocative punch bar 58 in amembe'r 59 which punch bar has a hardened nose or tool 60 operative transversely respecting guides 7 to engage the strip A to sever or break it by a blow against the same, (Figs. 1, 4 and 5). One of the guide members 7 is spaced at 61 for the entrance of the nose 60. To resiliently resist the blow of the tool an anvil is provided at 62, loosely mounted respecting the guideway 7 and backed by a spring 63. Beneath the guideway the backiugs B travel on a guiding strip 64, (Figs. 5 and 15). A reciprocative bar 65 slides in a guideway 66 in block 1c and carries a spring-pressed dog 67 that is adapted to engage inthe notches of the strip A between the backing pieces B to feed the same. A hardened pin 68 extends through the dog 67 to engage the backings B, (Fig. 15). The dog 67 is pivotally supported at 67 in such a manner that when bar 65 moves in the direction of the arrow w in Fig.,4, the'dog will engage .end or nose to engage the backing pieces B on the blade strip and pressed toward the latter by means of spring 71, (Figs. 1 and 4), whereby when strip A is fed the dog 69 will tilt to permit the feeding but will be resiliently pressed against the strip to resist return movement of the latter when dog 68 moves rearwardly along the strip. lThe punch bar 58 is normally pressed toward the strip by springs 72 attached toblock 1c and to a pin or the like 73 carried by the bar 58, as by a head 74 thereon. A spring-pressed do 75 pivoted at 76 is adapted to engage an release a stop 77 on bar 58, to retaln and release said bar, so that when the bar is released the spring 72 will force the bar with sudden driving impact toward strip A. A spring 78 normallypresses the dog toward bar 58, (Fig. 4). The slide bar 65 carries lan arm 79 having an inclined or cam-like surface at 8O adapted to engage a pin or projection 81 carried by bar 58 to cause the bar to retreat from strip A and place sprin 72 under increased tension. The bar 58 1s tinued movement of 'arm 79 will causere` shown provided with a" slot 58El 'inwhich the arm 79 is located, (Fig. 5). The arm 79 is secured-to bar 65 and extends parallel therewith so as to be reciprocated with said bar, (Fig.- 4). The projection 81 is adapted to advance toward 'arm 79 without interference by surface 80 when the parts are in the position to sever strip-A, substantially as indicated in Fig. 4, Vwhen dog 75 has released the barh58. When arm 79 is moved toward the bottom of Fig. 4 the surface 80 will be movedinto engagement with vprojection 81 toy withdraw bar 58 and to cause engagement of its stop 77 with do .7 5. rWhen arm 79 moves in the last name direction a projection 79n onk said arm will engage a pawl 82 pivoted on dog 75, at 83, and spring pressed toward arm 79 by a` spring 84, being limited in such 'directionv by al stop 85, (Fig. 4). When arm 79 moves in thevr last named direction its projection 7 9a by engagement with pa-wl 82 will cause dog 75 to tilt torelease bar 58, whereupon the latter Awillbe moved suddenly' toward strip A to sever the latter between two backings B, and conlease of Kits projection 7 9nl from pawl 82, as in the position shpwn in Fig. 1, whereby, dog 75 ma return to position to again. engage stop 7;); lwhen surface 80 of arm 79, being lengaged with projection 81, again moves bar dicated by the dotted llne b in Fi .Y 14, and

y of -bar 58 its head 74 isada'pted .to engage 110. pressed by springl 111 te engage one or and limit the advance of the bar 58 to the pivotally connected with bar 65, which link il block engages dog 112 the pin will-be withwhen the bar moves reversely t e dog 68 will slip along a backing'piece B,'t he dog 75 will release bar 58 to strike a blow against strip Ato sever the strip, asindicatedat c in Fig. 14, vand theY surface 80 will o erate on projection .8,1 to reset ,bar 58 to e rethrow of the crank-pin the sameis shown carried by a block 93 adjustable radially in a guideway 94 in a disk 95 secured upon shaft 42 and held in set'position by screw 96, (Figs. 2, 6` and 7).

The blades having the backings B secured thereto may be delivered from the machine in any suitable way. By preference the .blades are delivered into a receiver 97 that is removably mounted upon a carriage 98 slidable along 2guides 99 carried by frame 1,

(Figs. 1 and Thereceiver 97 is shown provided with spaced 'transverse strips 97 between which the'blades are fed. The.car riage is normallyfed in ,thek direction of the arrow y in'gFig.- 1, for which purpose a flexible connection or rope 100 is attached tothe carriage and passes over a pulley 101 from which it depends and is provided with a weight 102 to pull the carriage. 4The car- .riage 'is provided with a longitudinally disposed rack 103 adapted to be engaged by dog 104 carried by alever 105 pivoted at .106 land pressed bya spring 107 toward the rack. The lever has a projectionl08 in the path of blades entering a lspace between adjacent strips 97. When a desired series of blades have entered such space and have been final- 'ly pushed against the projection 108 the 55 A latter willmove the dog 104 out of engagement with rack 103, whereby the weight will pull the carriage, and when the said blade has passed from the projection 108 the dog` v104 will snap back against theV rack to stop l theV carriage with the next space between strips- 97al in position toreceive blades, and.

so on as the spaces between said strips are filled with blades. When thereceiver 97 is charged with blades, or substantially so, it may be removed from the carriage andanother replaced, and the carriage moved back to the initial position, and so on.

In order to automatically stop the machine' when thel receiver and its carriage 4 screw or plug 89 carried by'block 1c adapted tained 'by dog '75. for `the next working have reached the limit of travel with blades stroke, so that when bar 65 again vadvances in the spaces between the last series of strips the bar 58 will remain set while dog 68 feeds" 97, we provide means to v automatically restrip A for another blade, and so on suclease the clutch between shaft 2 and pulley cess'ively. 3 before"referred to. A? member 109 isv To resilientlyr limit the striking distance keyed on shaft 2 and provided with a pin a. spring pressed cap v86mounted slidably more notches in wheel`4. A'dog or linger upon a hub 87 'at the 'side `of block 1.y 112 is pivotally supported at 113 on a Springs 88 interposed between said hub and bracket 114 secured upon the main frame, cap normally force the latter' outwardly. A, the free end of whichdog is operative in an 1 annular groove 109a in member 109, to engage recesses in cap 86. retains said (Figs. 2 and 11). The upper end -of dog cap adjustably to resist the blow of head 74 112 is 'bevelled at one side at 112, (Fig. 3),

to engage block 115 slidable in way 116, of work. l member 109 and provided' with an inclined The bar 65 .may be reciprocated in any surface 115a to engage dog 112. Said block suitable way. .We have shown(` a link 91c is connected with pin 110 so that when the is pivotally connected with a crank-pin at drawn to release memberr-109 from the drive 92 carried by shaft. 42. To regulate the pulley, thereby to stop shaft 2 and the maportedl upon bracket 114, (Fig. 2), which link is plvotally connected with a rod 120 that is pivoted at 12.1.toa lever.. .122.pivoted on the main frame at 123, (Fig. 1). The free end of lever 122 extends in position to be grasped by the operator through a guide at 124, where it is adapted to be engaged by a stop dog 125 when the machine is to operate, (Figs. 1, 9 and 10). "Stop dog 125 is carried vby 'or formed with a lever 125a pivoted at 126 andnormally pressed upwardly by a spring 127, the dog 125 being stopied by guide plate 124B. A' button or han piece 128 is over lever 125a in position to be readily engaged and cooperates with said lever to depress it when it is desired to stop the machine manually. When the free end of lever 122 is moved to the right in Figs. 1, 9 and 10 it will shift dog 112 to withdraw it from the path of block 115 andsaid lever will be engaged by stop dog 125, and pulle 3 will drive shaft 2. If lever 125 be pushe downwardly the dog 125 will release lever 122 and spring 117 will move dog 112 into the path of block 115 and corre-- spondingly shift 'lever '122, stopping the machine. While stop lever '125 may be operated by means of button 128 it is also operative by lmeans of' a bell-crank lever 129 pivoted'at 130 and pivotally connected by a rod 131`with an angle-lever`1'32pivoted at 133, `(Fi 9). An upstanding' arm 132a has a latera ly disposed portion 132b located in the path of a stop 134 on carriage 98. Stop 134 `is preferably .in the form of a screw to4 permit adjustability i-n res ect to lever arm 132", (Fig. 10). When tie machine is operating and lever 132 is retained by stop dog 125, lever arm 132b will be in' register with stop 134 of carriage 98. When .razor blades have been charged into the space between the last pair of strips 97 of the receiver 97 and the carriage 98 starts to move, thestop 134 will engage lever arm 132", causing lever 129 to rotate, which will depress 'lever 125 'causing stop 125 to re- -lease lever 122 and spring 117 will thereupon move dogl112 into the path o f block 115 to unshift t e clutch pin 110 and stop rotation of shaft 2.

The operation may be described as follows. To commence operations the strip A 1s fed between the rolls 5 through feeder 33, between the separated jaws 36, thence between rolls 8, 9 and through guide 7 a -suitable distance to be engaged by dog 67, and the magazine .is charged with backing p1eces B. Lever 122:,is shifted to be held by stop 125 and the machine will operate. The

dog 18 will engage a notch. a in strip A to assure that the latter assumes a proper position respecting jaws 36. -Feeder 33 will operate to feed a backing piece B along strip A in proper position between jaws 36. Jaws 36 will approach to squeeze the sides of the backing piece B securely against strip A and will recede to free the piece B. Bar 65 will be retreatingfrom bar 58 and dog 75 will release bar 58 to cause it to sever strip A, and before the limit of such travel of bar 65 the surface 80 will engage projection 81 toreset bar 58 to beheld by do 75 out of the path of strip A. Correspon ing operations occur successively for each blade to be backed'I and cut from strip A, such strip pushing the cut oli' blades through guide 7 into the. receiver 97.

The strip feeding operations of dogs 18 and 67 are independent of but with relation to each other. The dog 18 has a limited strip feeding movement to assure the proper position of strip A between ljaws 36 to receive the successive backing pieces B. When the cutting edge is formed on a steel strip A and the 'spaced notches a formed therein before the strip is hardened or tempered the metal is liable to shrink in some places when hardened thereby disarranging the original spaced relation of some of the notches a with relation to one another. The feeding dog 18, by sliding a short distance along the strip will enter the notches a successively and feed the strip, if necessary, such a distance with relation tojaws 36, as will rectify any variation of distance between notches a so that strip A will always assume a correct initial position for reception of backing pieces B respecting jaws 36 so that the pieces B will always be properly positioned upon strip A. With such initial setting of backings B u on strip A the dog 67 will lfeed the strip nall step by step, .for each blade, the require distance independent of the initial setting of the strip y dog 18.

'The machine will apply the backings to stripA and cut off the finished backed blades successively, accurately, automatically and expeditiously.

Having now described our invention what we claim is:

1. A machine for backing blades comprising means to feed a'strip, means to apply backings thereto successively, means to clamp the backings upon the stri and means to sever to strip between the bac ings to produce blades.

2. A machine forbacking blades comprising means to feed a strip, means to apply backings thereto successively, means to clamp the backings upon the strip, means to sever the strip between the backings to produce blades, a receiver for the blades, means to move the receiver step by step from blade receiving position, means to drive the machine including clutch devices,

l vand controllinv means for the clutch-devices `.operative by t e receiver'rmoving means to stop the-machine. v

l 3. Amachine vfor backing blades comprising means tof move a strip step by step, clamping'means on o posite sides of the strip, means to supp 'backi'ngs' to the strip, meansjto feed the backings successively to said clamping means,` mechanismI to actuate vthe clamping means to secure .the backings successively and adjacent on 'the strip, and meanszto sever'the strip be- .tween 'adjacent backings.

4. A machine for backing blades comprising means tov guide a strip, clamping means on opposite 'sides of the strip, .devices to initially-feed they strip successively to defivnite positions relative. to the clamping means, means to supply backings to the strip, devices, to` feed the backin s successively to the clamping means, evices to f sever the strip between bacliings, and means to feed the strip to the severing devices andto actuate the latter-to sever the strip successively.

5. A machine for backing blades comprising means to guide a strip, devices to feed the strip step y step, a magazine 'for backings providedwith means to propel the backingsto the strip, clamping-devices for the' backings, a feeder for the'backings tol feed themsuccessively to'clamping position along the strip, means to actuate the feeder, and means .to sever-the strip successively between backings thereon.

' 6. A machine for backing blades comprising meansto guide a strip, means to feed the strip step by step, clamping jaws on opposite sides of the strip, means to actuate 'the-clamping jaws, a magazine for backings provided with means. to deliver the backings to the strip, a reciproca-tive feeder to push the backings from the magazine to position ybetween the jaws successively, and

means to sever the strip successively between backings thereon. v

,. 7, A machine for backing blades compris- I ing guiding means for a notched strip, a dog to engage said, notches, means to recipro- .cate the do along the strip for initial ad-' justmentA o the latter, clamping means on opposite sides of the strip spaced from the dog, mechanism to operate the clamping means, means to supply backings to the strip,

yand the driving rying the dog, alever to operate said member, means to actuate said lever, a supply for backings, means to feed backings suc- 'i lcessively between said jaws along the strip,

ing guiding means for a strip, clampingI jaws on opposite sides of the strip, mechanism to reciprocate said jaws toward and from the strip simultaneously, a magazine for backings,n1eans to maintain the backings pressed toward-the strip, a feeder to push backings along the strip between the jaws while the jaws are separated, devices to sever the'stiip between backings thereon, and means to feed tlie 'strip step by step respecting lthe severing devices after the jaws have secured backings onthe strip.

'10. A machine for backing blades coinprising guiding means'for a strip, clamping jaws on opposite sides of the strip, a drive shaft, means to drive said shaft,v clutch means to connect and disconnect the shaft andA the driving means, jaws on opposite sides of the strip, devices operated by said shaft to reciprocate said jaws toward and vfrom the strip, a magazine for backings comprising means to feed the backings to'ward the strip, a feeder to push the backings successively between the jaws, mechanism operatedby said shaft to actuate the feeder, cutting means to sever-the strip` between backings, means to feed the strip step by step, mechanism operated by the shaft` to actuate the severing and feeding means, a carriage movable transversely wit respect .to the strip, means to move the carriage,

means to check the movement of the carriage provided with a projection in register with the strip, and a receiver upon the ca rriage for blades, said projection 4being in position to be engaged by blades in said receiver to release the carriage.

11. A machine for backing blades .comprising guiding means for a strip, clamping jaws on opposite sides of the strip, a drive shaft, means to dri-ve said shaft, clutch means to connect and disconnect the shaft sides of the strip, devices operated by said shaft to reciprocate said jaws toward and from the strip, a magazine for backings comprising means to feed the backings toward the strip, afeeder to push the backings successively between the jaws, mechanism operated by said shaft to actuate the feeder, cutting means to sever the strip between backin s, means to feed the strip ste by step, mec anism operated by the sha t to actuate the severing'and feeding means, a carriage movable transversely with respect means, jaws on opposite v to the strip, means to move the carriage, means to check the movement of the carriage provided wlth a projection in registerI with the strip, a receiver upon the carjaws on opposite sides of the strip, a driveshaft, means to drive said shaft, ,clutch means to connect and disconnect the shaft and the driving means, jaws on opposite sides of the strip, devices operated by said shaft to reciprocatesaid jaws toward and fromthe strip, a magazine for backings comprising means to feedthe backings toward the strip, a feeder to push the backings successively between the jaws, mechanism operated by said shaft to actuate the feeder, cutting means to sever the strip between backings, means to feed the str1p step by step, mechanism operated by the shaft to actuate the severingand feeding means, a carriage movable transversely with respect 'to the strip, means t move the carriage, meansto check the movement of the carriage provided with a projection in register with the strip, a receiver upon `the carriage for blades, said projection being in position to be engaged by blades in said receiver to release the carriage, devices to control the clutch including a lever, a stop -for said lever to retain the clutch in operative `relation to the shaft, a second lever cooperative with a catch to cause it to release the first named lever, and a third lever connected with the y second named lever and provided with an armto be actuated by the carriage to cause release of the stop from the first named lever.

13. A machine for backing blades comstep.

prising means to guide a strip, a magazine `from the magazine to position along the strip between the jaws, means to operate the feeder, means to actuate the jaws, devices to sever the strip between backings thereon, and mechanism to feed the strip step by 14. A machine forjbacking blades comprising means to guide a strip, a manazinc for backings beneath the strip, a mem er in the magazine to support the backings, means normally moving said member toward the strip, jaws to s ueeze the backings against the strip, a fee er to feed backings from the magazine to position along the strip between the jaws, means to operate the feeder, means to actuate the jaws, devices to sever the strip between backings thereon, and a reciprocative bar having a dog to feed the strip,the severing devices havmg a dog to control the cutter, said bar having means to control -the second named dog and the cutter during reciprocations of the bar.

15. A machine for making razor blades comprising means for feeding aA strip, means for securing backings one after another along an edge of the strip, and means for vsevering the strip between the backinffs to produce individual blades having a backing. 16. A machine for making razor blades Comprising means for feeding a strip step by step, means for applying a backing alon an edge of the strip at each stop thereof, an means for severing the strip between the backings to produce individual blades each having a backing along an edge thereof.

Signed at New York city, county and State of New York, this 21st day of March,

HENRY J. GAISMAN. CONRAD SCHUMACHER 

